12258475521 has 4 divisors (see below), whose sum is σ = 16344634032. Its totient is φ = 8172317012.

The previous prime is 12258475477. The next prime is 12258475543. The reversal of 12258475521 is 12557485221.

12258475521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12258475521 - 2²³ = 12250086913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12258475321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2043079251 + ... + 2043079256.

It is an arithmetic number, because the mean of its divisors is an integer number (4086158508).

Almost surely, 2^12258475521 is an apocalyptic number.

It is an amenable number.

12258475521 is a deficient number, since it is larger than the sum of its proper divisors (4086158511).

12258475521 is an equidigital number, since it uses as much as digits as its factorization.

12258475521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4086158510.

The product of its digits is 224000, while the sum is 42.

The spelling of 12258475521 in words is "twelve billion, two hundred fifty-eight million, four hundred seventy-five thousand, five hundred twenty-one".